package servlets.module.challenge;

import dbProcs.Database;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.Locale;
import java.util.ResourceBundle;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.owasp.encoder.Encode;
import utils.ShepherdLogManager;
import utils.Validate;

/**
 * Cross Site Request Forgery Challenge Six - Does not return result Key <br>
 * <br>
 * This file is part of the Security Shepherd Project.
 *
 * <p>The Security Shepherd project is free software: you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software Foundation, either
 * version 3 of the License, or (at your option) any later version.<br>
 *
 * <p>The Security Shepherd project is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 * PURPOSE. See the GNU General Public License for more details.<br>
 *
 * <p>You should have received a copy of the GNU General Public License along with the Security
 * Shepherd project. If not, see <http://www.gnu.org/licenses/>.
 *
 * @author Mark Denihan
 */
public class CsrfChallengeSixGetToken extends HttpServlet {

  private static final long serialVersionUID = 1L;
  private static final Logger log = LogManager.getLogger(CsrfChallengeSixGetToken.class);
  public static final String levelHash =
      "7d79ea2b2a82543d480a63e55ebb8fef3209c5d648b54d1276813cd072815df3";
  private static String levelName = "CSRF Challenge 6 Get Token";

  /**
   * Allows users to retrieve their CSRF token for the CSRF Challenge 6 module
   *
   * @param myMessage To Be stored as the users message for this module
   */
  public void doGet(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {
    // Setting IpAddress To Log and taking header for original IP if forwarded from proxy
    ShepherdLogManager.setRequestIp(request.getRemoteAddr(), request.getHeader("X-Forwarded-For"));
    log.debug("Cross-SiteForegery Challenge Get Token Six Servlet");

    // Translation Stuff
    Locale locale = new Locale(Validate.validateLanguage(request.getSession()));
    ResourceBundle errors = ResourceBundle.getBundle("i18n.servlets.errors", locale);
    ResourceBundle csrfGenerics =
        ResourceBundle.getBundle("i18n.servlets.challenges.csrf.csrfGenerics", locale);

    PrintWriter out = response.getWriter();
    out.print(getServletInfo());
    try {
      HttpSession ses = request.getSession(true);
      if (Validate.validateSession(ses)) {
        log.debug(levelName + " servlet accessed by: " + ses.getAttribute("userName").toString());
        String htmlOutput = new String("Your csrf Token for this Challenge is: ");
        String userId = request.getParameter("userId").toString();

        Connection conn =
            Database.getChallengeConnection(
                getServletContext().getRealPath(""), "csrfChallengeSix");
        try {
          log.debug("Preparing setCsrfChallengeSixToken call");
          PreparedStatement callstmnt =
              conn.prepareStatement(
                  "SELECT csrfTokenscol FROM csrfchallengesix.csrfTokens WHERE userId LIKE ?");
          callstmnt.setString(1, userId);
          log.debug("Executing setCsrfChallengeSixTokenQuery");
          ResultSet rs = callstmnt.executeQuery();
          int i = 0;
          while (rs.next()) {
            i++;
            htmlOutput += Encode.forHtml("\"" + rs.getString(1) + "\"") + " <br/>";
          }
          log.debug("Returned " + i + " CSRF Tokens for ID: " + userId);
          conn.close();
        } catch (Exception e) {
          log.debug("Could not retrieve Challenge CSRF Tokens: " + e.toString());
          htmlOutput = csrfGenerics.getString("error.noToken");
        }
        out.write(htmlOutput);
      }
    } catch (Exception e) {
      out.write(errors.getString("error.funky"));
    }
  }
}
